Calculating dependencies -
!!! All ebuilds that could satisfy "=media-libs/gst-plugins-0.8.12*" have been masked.
!!! One of the following masked packages is required to complete your request:
- media-libs/gst-plugins-0.8.12 (masked by: ~amd64 keyword)

For more information, see MASKED PACKAGES section in the emerge man page or
refer to the Gentoo Handbook.
(dependency required by "media-plugins/gst-plugins-esd-0.8.12" [ebuild])